Which phase of TOGAF focuses on ensuring implementation conforms to the target architecture?

The phase that focuses on ensuring implementation conforms to the target architecture is Phase G. This phase is known as the "Architecture Change Management" phase. Its primary purpose is to manage changes to the architecture in response to various factors, including project changes, business requirements, or technological advancements.

During Phase G, the governance framework is applied to ensure that any implementation of the architecture aligns with the target state defined in earlier phases. This includes managing and assessing changes, making sure that modifications do not deviate from the established architecture standards and guidelines. Phase G emphasizes ongoing monitoring and refinement of the architecture as it evolves, which supports the effectiveness and alignment of actual implementations with the intended architecture.

In contrast, other phases are focused on different aspects of the architecture development lifecycle, such as initial architecture vision, architecture definition, and transitions to implementation, making them less directly related to the compliance of implementation with the target architecture.